diff --git a/tabs/initial_setup.html b/tabs/initial_setup.html
index 71fb080e01..a4096df226 100644
--- a/tabs/initial_setup.html
+++ b/tabs/initial_setup.html
@@ -48,8 +48,8 @@
             <div class="fields">
                 <dl>
                     <dt>Voltage:</dt><dd class="bat-voltage">0 V</dd>
-                    <dt>Min Cell Voltage:</dt><dd><input type="number" name="mincellvoltage" step="0.1" value="0" /></dd>
-                    <dt>Max Cell Voltage:</dt><dd><input type="number" name="maxcellvoltage" step="0.1" value="0" /></dd>
+                    <dt>Min Cell Voltage:</dt><dd><input type="number" name="mincellvoltage" step="0.1" min="1" max="5" value="0" /></dd>
+                    <dt>Max Cell Voltage:</dt><dd><input type="number" name="maxcellvoltage" step="0.1" min="1" max="5" value="0" /></dd>
                     <dt>Voltage Scale:</dt><dd><input type="number" name="voltagescale" min="10" max="200" value="0" /></dd>
                 </dl>
             </div>